All liaisons are dangerous when all your friends are known to us

Online Social Networks (OSNs) are used by millions of users worldwide. Academically speaking, there is little doubt about the usefulness of demographic studies conducted on OSNs and, hence, methods to label unknown users from small labeled samples are very useful. However, from the general public point of view, this can be a serious privacy concern. Thus, both topics are tackled in this paper: First, a new algorithm to perform user profiling in social networks is described, and its performance is reported and discussed. Secondly, the experiments --conducted on information usually considered sensitive-- reveal that by just publicizing one's contacts privacy is at risk and, thus, measures to minimize privacy leaks due to social graph data mining are outlined.Comment: 10 pages, 5 table

New Environmental Friendly Yellow Ceramic Pigments of the Type (FeIIIMV)-TiO2

The family of Cr(III) and Fe(III)-doped rutile pigments of nominal composition (MIIIM’ V )xTi1-2xO2 , with MIII = Cr(III) or Fe(III) and M’(V) = Sb, Nb, Ta, with x = 0.03, 0.15 and 0.25 were investigated as ceramic pigments covering the yellow-ochre-brown palette. The formulations containing Fe(III) are novel compositions not included in the commercial rutile pigments. The materials were characterized by XRD (X-ray diffraction) analysis and FTIR (Fourier transformed infrared spectroscopy). The transition temperature from anatase-to-rutile was estimated by the evolution of the spectral patterns. This crystal phase transition is responsible of the color formation. A higher distortion of TiO6 octahedra is observed in the case of (FeSb) containing cells which contribute to the enhancement of the light absorption. The coloring performance of all the formulations were evaluated by enameling the mixtures containing 5% pigments and commercial frits representative of single and double firing industrial processes. The chromatic values obtained are in the yellow to brown domain of the chromatic plot, depending on the composition of the pigment-frit batch. In the case of the Fe-glazes, and particularly the combination (FeNb), the chromatic values are close to the best yellow tinting. This new FeNb-rutile pigment could be a more benign substitute of Cr-yellow pigments. The homogeneity of the enamels was confirmed by SEM (scanning electron microscopy)-EDAX (energy dispersive X-ray analysis) microscopy.Fil: Lavat, Araceli Elisabet. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Gayo, Griselda Xoana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentin

Conceptual graph-based knowledge representation for supporting reasoning in African traditional medicine

Although African patients use both conventional or modern and traditional healthcare simultaneously, it has been proven that 80% of people rely on African traditional medicine (ATM). ATM includes medical activities stemming from practices, customs and traditions which were integral to the distinctive African cultures. It is based mainly on the oral transfer of knowledge, with the risk of losing critical knowledge. Moreover, practices differ according to the regions and the availability of medicinal plants. Therefore, it is necessary to compile tacit, disseminated and complex knowledge from various Tradi-Practitioners (TP) in order to determine interesting patterns for treating a given disease. Knowledge engineering methods for traditional medicine are useful to model suitably complex information needs, formalize knowledge of domain experts and highlight the effective practices for their integration to conventional medicine. The work described in this paper presents an approach which addresses two issues. First it aims at proposing a formal representation model of ATM knowledge and practices to facilitate their sharing and reusing. Then, it aims at providing a visual reasoning mechanism for selecting best available procedures and medicinal plants to treat diseases. The approach is based on the use of the Delphi method for capturing knowledge from various experts which necessitate reaching a consensus. Conceptual graph formalism is used to model ATM knowledge with visual reasoning capabilities and processes. The nested conceptual graphs are used to visually express the semantic meaning of Computational Tree Logic (CTL) constructs that are useful for formal specification of temporal properties of ATM domain knowledge. Our approach presents the advantage of mitigating knowledge loss with conceptual development assistance to improve the quality of ATM care (medical diagnosis and therapeutics), but also patient safety (drug monitoring)

KAJIAN KESERAGAMAN KUALITAS PLIEK U PADA PENGERINGAN DENGAN MENGGUNAKAN ALAT PENGERING TIPE HOHENHEIM

Banda Ace

SOCIOECONOMIC FACET OF FISHERIES MANAGEMENT IN HOMBOLO DAM, DODOMA - TANZANIA

Assessment of fisheries activities in socioeconomic context is paramount if to guarantee adaptive co-management of the resources. The study investigated the status of fishing activities and documented the drivers threatening fish stock in the Hombolo Man-made Dam between January and October 2019. Semi-structured interviews, Focus group discussion, Key informants interviews, direct field observations and documentary review were employed to collect data. Content analysis, Statistical Package for Social Sciences version 20 and ERDAS software were used to analyze data. Results show the decline in amount of fish harvested (AFH) by 72.5% at β ± SE: -0.99 ± 0.14, t=-3.05, p = 0.003 between 2011 and 2019. Similarly, number of fishermen and fishing boats decreased by 67% at -0.36 ± 0.71, t=-0.24, p = 0.016 and 53% at -0.58 ± 0.21, t=-1.33, p = 0.006 respectively between 2005-2019. The observed decrease in AFH, fishermen and fishing vessels perceived to imply the decline in the dam fish stock. Overfishing, population increase, poverty and inadequate law enforcement were perceived as drivers of fish stock attenuation. The study recommends further assessment of the dam ecology for effective fish restocking and provisioning of environmental education along with effective law enforcement for sustainable management of the dam

Semantics and Validation of Shapes Schemas for RDF

We present a formal semantics and proof of soundness for shapes schemas, an expressive schema language for RDF graphs that is the foundation of Shape Expressions Language 2.0. It can be used to describe the vocabulary and the structure of an RDF graph, and to constrain the admissible properties and values for nodes in that graph. The language defines a typing mechanism called shapes against which nodes of the graph can be checked. It includes an algebraic grouping operator, a choice operator and cardinality constraints for the number of allowed occurrences of a property. Shapes can be combined using Boolean operators, and can use possibly recursive references to other shapes. We describe the syntax of the language and define its semantics. The semantics is proven to be well-defined for schemas that satisfy a reasonable syntactic restriction, namely stratified use of negation and recursion. We present two algorithms for the validation of an RDF graph against a shapes schema. The first algorithm is a direct implementation of the semantics, whereas the second is a non-trivial improvement. We also briefly give implementation guidelines

The Use Of Mediation In Maritime And Fisheries Dispute Resolution

AbstractThe sea is one of the boundaries between countries and is one of the sources of income and life of a nation, Marine Management provides benefits that are so great that all parties orcountries want to explore and exploit these resources, including the high seas, so thatsometimes it causes disputes between partiesincluding between countries in carrying outits management. Disputes that occur can be resolved nationally or internationally,depending on the parties to the dispute in it. Internationally, the settlement of fisheriesdisputes that occur at sea can be resolved peacefully between the two parties, but if apeaceful agreement between the parties cannot be reached , then the procedure forresolving fisheries disputes at sea can be done by mediation methods, namely cooperativemaritime diplomacy, persuasive maritime diplomacy and coercive maritime diplomacy.Keywords: Alternative Dispute Resolution, Marine, Fisherie

UJI EFEK ANTELMINTIK EKSTRAK METANOL JANGJINGKI (OXALIS CORNICULATA L.) TERHADAP CACING ASCARIDIA GALLI SECARA IN VITRO

ABSTRAKJangjingki (Oxalis corniculata L.) merupakan tumbuhan yang secara tradisional telah digunakan masyarakat di dataran tinggi Gayo sebagai obat cacing (antelmintik). Penelitian ini bertujuan untuk mengetahui efek antelmintik ekstrak metanol jangjingki terhadap cacing Ascaridia galli secara in vitro dan mengetahui konsentrasi optimum ekstrak metanol daun jangjingki yang memberikan efek antelmintik. Penelitian ini bersifat eksperimental yang terdiri dari lima perlakuandengan tiga kali pengulangan, yaitu kelompok kontrol negatif (NaCl 0,9%), kontrol positif (Pirantel Pamoat 0,5%) dan tiga kelompok uji ekstrak metanol jangjingki dengan konsentrasi 10, 30, dan 50%. Hewan uji yang digunakan yaitu cacing Ascaridia galli. Jumlah paralisis dan lisis cacing dinilai setiap 15 menit selama 3 jam. Hasil skrining fitokimia pada ekstrak metanol jangjingki mengandung senyawa metabolit sekunder meliputi tanin, alkaloid, flavonoid, dan saponin. Hasil pengujian menunjukkan bahwa ekstrak metanol jangjingki mempunyai aktivitas antelmintik terhadap cacing Ascaridia galli dan hasil pengujian konsentrasi terbaik ekstrak metanol jangjingki sebesar 30%.Kata kunci : Antelmintik, ekstrak metanol jangjingki, Ascaridia galli